third_party/musl/src/network/res_msend.c - cobalt - Git at Google

 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 #include <netdb.h>
 #include <arpa/inet.h>
 #include <stdint.h>
 #include <string.h>
 #include <poll.h>
 #include <time.h>
 #include <ctype.h>
 #include <unistd.h>
 #include <errno.h>
 #include <pthread.h>
 #include "stdio_impl.h"
 #include "syscall.h"
 #include "lookup.h"

 static void cleanup(void *p)
 {
 	struct pollfd *pfd = p;
 	for (int i=0; pfd[i].fd >= -1; i++)
 		if (pfd[i].fd >= 0) __syscall(SYS_close, pfd[i].fd);
 }

 static unsigned long mtime()
 {
 	struct timespec ts;
 	if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0 && errno == ENOSYS)
 		clock_gettime(CLOCK_REALTIME, &ts);
 	return (unsigned long)ts.tv_sec * 1000
 		+ ts.tv_nsec / 1000000;
 }

 static int start_tcp(struct pollfd *pfd, int family, const void *sa, socklen_t sl, const unsigned char *q, int ql)
 {
 	struct msghdr mh = {
 		.msg_name = (void *)sa,
 		.msg_namelen = sl,
 		.msg_iovlen = 2,
 		.msg_iov = (struct iovec [2]){
 			{ .iov_base = (uint8_t[]){ ql>>8, ql }, .iov_len = 2 },
 			{ .iov_base = (void *)q, .iov_len = ql } }
 	};
 	int r;
 	int fd = socket(family, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 	pfd->fd = fd;
 	pfd->events = POLLOUT;
 	if (!setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN_CONNECT,
 	    &(int){1}, sizeof(int))) {
 		r = sendmsg(fd, &mh, MSG_FASTOPEN|MSG_NOSIGNAL);
 		if (r == ql+2) pfd->events = POLLIN;
 		if (r >= 0) return r;
 		if (errno == EINPROGRESS) return 0;
 	}
 	r = connect(fd, sa, sl);
 	if (!r || errno == EINPROGRESS) return 0;
 	close(fd);
 	pfd->fd = -1;
 	return -1;
 }

 static void step_mh(struct msghdr *mh, size_t n)
 {
 	/* Adjust iovec in msghdr to skip first n bytes. */
 	while (mh->msg_iovlen && n >= mh->msg_iov->iov_len) {
 		n -= mh->msg_iov->iov_len;
 		mh->msg_iov++;
 		mh->msg_iovlen--;
 	}
 	if (!mh->msg_iovlen) return;
 	mh->msg_iov->iov_base = (char *)mh->msg_iov->iov_base + n;
 	mh->msg_iov->iov_len -= n;
 }

 /* Internal contract for __res_msend[_rc]: asize must be >=512, nqueries
  * must be sufficiently small to be safe as VLA size. In practice it's
  * either 1 or 2, anyway. */

 int __res_msend_rc(int nqueries, const unsigned char *const *queries,
 	const int *qlens, unsigned char *const *answers, int *alens, int asize,
 	const struct resolvconf *conf)
 {
 	int fd;
 	int timeout, attempts, retry_interval, servfail_retry;
 	union {
 		struct sockaddr_in sin;
 		struct sockaddr_in6 sin6;
 	} sa = {0}, ns[MAXNS] = {{0}};
 	socklen_t sl = sizeof sa.sin;
 	int nns = 0;
 	int family = AF_INET;
 	int rlen;
 	int next;
 	int i, j;
 	int cs;
 	struct pollfd pfd[nqueries+2];
 	int qpos[nqueries], apos[nqueries];
 	unsigned char alen_buf[nqueries][2];
 	int r;
 	unsigned long t0, t1, t2;

 	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);

 	timeout = 1000*conf->timeout;
 	attempts = conf->attempts;

 	for (nns=0; nns<conf->nns; nns++) {
 		const struct address *iplit = &conf->ns[nns];
 		if (iplit->family == AF_INET) {
 			memcpy(&ns[nns].sin.sin_addr, iplit->addr, 4);
 			ns[nns].sin.sin_port = htons(53);
 			ns[nns].sin.sin_family = AF_INET;
 		} else {
 			sl = sizeof sa.sin6;
 			memcpy(&ns[nns].sin6.sin6_addr, iplit->addr, 16);
 			ns[nns].sin6.sin6_port = htons(53);
 			ns[nns].sin6.sin6_scope_id = iplit->scopeid;
 			ns[nns].sin6.sin6_family = family = AF_INET6;
 		}
 	}

 	/* Get local address and open/bind a socket */
 	fd = socket(family, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

 	/* Handle case where system lacks IPv6 support */
 	if (fd < 0 && family == AF_INET6 && errno == EAFNOSUPPORT) {
 		for (i=0; i<nns && conf->ns[nns].family == AF_INET6; i++);
 		if (i==nns) {
 			pthread_setcancelstate(cs, 0);
 			return -1;
 		}
 		fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 		family = AF_INET;
 		sl = sizeof sa.sin;
 	}

 	/* Convert any IPv4 addresses in a mixed environment to v4-mapped */
 	if (fd >= 0 && family == AF_INET6) {
 		setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &(int){0}, sizeof 0);
 		for (i=0; i<nns; i++) {
 			if (ns[i].sin.sin_family != AF_INET) continue;
 			memcpy(ns[i].sin6.sin6_addr.s6_addr+12,
 				&ns[i].sin.sin_addr, 4);
 			memcpy(ns[i].sin6.sin6_addr.s6_addr,
 				"\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
 			ns[i].sin6.sin6_family = AF_INET6;
 			ns[i].sin6.sin6_flowinfo = 0;
 			ns[i].sin6.sin6_scope_id = 0;
 		}
 	}

 	sa.sin.sin_family = family;
 	if (fd < 0 || bind(fd, (void *)&sa, sl) < 0) {
 		if (fd >= 0) close(fd);
 		pthread_setcancelstate(cs, 0);
 		return -1;
 	}

 	/* Past this point, there are no errors. Each individual query will
 	 * yield either no reply (indicated by zero length) or an answer
 	 * packet which is up to the caller to interpret. */

 	for (i=0; i<nqueries; i++) pfd[i].fd = -1;
 	pfd[nqueries].fd = fd;
 	pfd[nqueries].events = POLLIN;
 	pfd[nqueries+1].fd = -2;

 	pthread_cleanup_push(cleanup, pfd);
 	pthread_setcancelstate(cs, 0);

 	memset(alens, 0, sizeof *alens * nqueries);

 	retry_interval = timeout / attempts;
 	next = 0;
 	t0 = t2 = mtime();
 	t1 = t2 - retry_interval;

 	for (; t2-t0 < timeout; t2=mtime()) {
 		/* This is the loop exit condition: that all queries
 		 * have an accepted answer. */
 		for (i=0; i<nqueries && alens[i]>0; i++);
 		if (i==nqueries) break;

 		if (t2-t1 >= retry_interval) {
 			/* Query all configured namservers in parallel */
 			for (i=0; i<nqueries; i++)
 				if (!alens[i])
 					for (j=0; j<nns; j++)
 						sendto(fd, queries[i],
 							qlens[i], MSG_NOSIGNAL,
 							(void *)&ns[j], sl);
 			t1 = t2;
 			servfail_retry = 2 * nqueries;
 		}

 		/* Wait for a response, or until time to retry */
 		if (poll(pfd, nqueries+1, t1+retry_interval-t2) <= 0) continue;

 		while (next < nqueries) {
 			struct msghdr mh = {
 				.msg_name = (void *)&sa,
 				.msg_namelen = sl,
 				.msg_iovlen = 1,
 				.msg_iov = (struct iovec []){
 					{ .iov_base = (void *)answers[next],
 					  .iov_len = asize }
 				}
 			};
 			rlen = recvmsg(fd, &mh, 0);
 			if (rlen < 0) break;

 			/* Ignore non-identifiable packets */
 			if (rlen < 4) continue;

 			/* Ignore replies from addresses we didn't send to */
 			for (j=0; j<nns && memcmp(ns+j, &sa, sl); j++);
 			if (j==nns) continue;

 			/* Find which query this answer goes with, if any */
 			for (i=next; i<nqueries && (
 				answers[next][0] != queries[i][0] ||
 				answers[next][1] != queries[i][1] ); i++);
 			if (i==nqueries) continue;
 			if (alens[i]) continue;

 			/* Only accept positive or negative responses;
 			 * retry immediately on server failure, and ignore
 			 * all other codes such as refusal. */
 			switch (answers[next][3] & 15) {
 			case 0:
 			case 3:
 				break;
 			case 2:
 				if (servfail_retry && servfail_retry--)
 					sendto(fd, queries[i],
 						qlens[i], MSG_NOSIGNAL,
 						(void *)&ns[j], sl);
 			default:
 				continue;
 			}

 			/* Store answer in the right slot, or update next
 			 * available temp slot if it's already in place. */
 			alens[i] = rlen;
 			if (i == next)
 				for (; next<nqueries && alens[next]; next++);
 			else
 				memcpy(answers[i], answers[next], rlen);

 			/* Ignore further UDP if all slots full or TCP-mode */
 			if (next == nqueries) pfd[nqueries].events = 0;

 			/* If answer is truncated (TC bit), fallback to TCP */
 			if ((answers[i][2] & 2) || (mh.msg_flags & MSG_TRUNC)) {
 				alens[i] = -1;
 				pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, 0);
 				r = start_tcp(pfd+i, family, ns+j, sl, queries[i], qlens[i]);
 				pthread_setcancelstate(cs, 0);
 				if (r >= 0) {
 					qpos[i] = r;
 					apos[i] = 0;
 				}
 				continue;
 			}
 		}

 		for (i=0; i<nqueries; i++) if (pfd[i].revents & POLLOUT) {
 			struct msghdr mh = {
 				.msg_iovlen = 2,
 				.msg_iov = (struct iovec [2]){
 					{ .iov_base = (uint8_t[]){ qlens[i]>>8, qlens[i] }, .iov_len = 2 },
 					{ .iov_base = (void *)queries[i], .iov_len = qlens[i] } }
 			};
 			step_mh(&mh, qpos[i]);
 			r = sendmsg(pfd[i].fd, &mh, MSG_NOSIGNAL);
 			if (r < 0) goto out;
 			qpos[i] += r;
 			if (qpos[i] == qlens[i]+2)
 				pfd[i].events = POLLIN;
 		}

 		for (i=0; i<nqueries; i++) if (pfd[i].revents & POLLIN) {
 			struct msghdr mh = {
 				.msg_iovlen = 2,
 				.msg_iov = (struct iovec [2]){
 					{ .iov_base = alen_buf[i], .iov_len = 2 },
 					{ .iov_base = answers[i], .iov_len = asize } }
 			};
 			step_mh(&mh, apos[i]);
 			r = recvmsg(pfd[i].fd, &mh, 0);
 			if (r <= 0) goto out;
 			apos[i] += r;
 			if (apos[i] < 2) continue;
 			int alen = alen_buf[i][0]*256 + alen_buf[i][1];
 			if (alen < 13) goto out;
 			if (apos[i] < alen+2 && apos[i] < asize+2)
 				continue;
 			int rcode = answers[i][3] & 15;
 			if (rcode != 0 && rcode != 3)
 				goto out;

 			/* Storing the length here commits the accepted answer.
 			 * Immediately close TCP socket so as not to consume
 			 * resources we no longer need. */
 			alens[i] = alen;
 			__syscall(SYS_close, pfd[i].fd);
 			pfd[i].fd = -1;
 		}
 	}
 out:
 	pthread_cleanup_pop(1);

 	/* Disregard any incomplete TCP results */
 	for (i=0; i<nqueries; i++) if (alens[i]<0) alens[i] = 0;

 	return 0;
 }

 int __res_msend(int nqueries, const unsigned char *const *queries,
 	const int *qlens, unsigned char *const *answers, int *alens, int asize)
 {
 	struct resolvconf conf;
 	if (__get_resolv_conf(&conf, 0, 0) < 0) return -1;
 	return __res_msend_rc(nqueries, queries, qlens, answers, alens, asize, &conf);
 }
	#include <sys/socket.h>
	#include <netinet/in.h>
	#include <netinet/tcp.h>
	#include <netdb.h>
	#include <arpa/inet.h>
	#include <stdint.h>
	#include <string.h>
	#include <poll.h>
	#include <time.h>
	#include <ctype.h>
	#include <unistd.h>
	#include <errno.h>
	#include <pthread.h>
	#include "stdio_impl.h"
	#include "syscall.h"
	#include "lookup.h"

	static void cleanup(void *p)
	{
	struct pollfd *pfd = p;
	for (int i=0; pfd[i].fd >= -1; i++)
	if (pfd[i].fd >= 0) __syscall(SYS_close, pfd[i].fd);
	}

	static unsigned long mtime()
	{
	struct timespec ts;
	if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0 && errno == ENOSYS)
	clock_gettime(CLOCK_REALTIME, &ts);
	return (unsigned long)ts.tv_sec * 1000
	+ ts.tv_nsec / 1000000;
	}

	static int start_tcp(struct pollfd pfd, int family, const void sa, socklen_t sl, const unsigned char *q, int ql)
	{
	struct msghdr mh = {
	.msg_name = (void *)sa,
	.msg_namelen = sl,
	.msg_iovlen = 2,
	.msg_iov = (struct iovec [2]){
	{ .iov_base = (uint8_t[]){ ql>>8, ql }, .iov_len = 2 },
	{ .iov_base = (void *)q, .iov_len = ql } }
	};
	int r;
	int fd = socket(family, SOCK_STREAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0);
	pfd->fd = fd;
	pfd->events = POLLOUT;
	if (!setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN_CONNECT,
	&(int){1}, sizeof(int))) {
	r = sendmsg(fd, &mh, MSG_FASTOPEN\|MSG_NOSIGNAL);
	if (r == ql+2) pfd->events = POLLIN;
	if (r >= 0) return r;
	if (errno == EINPROGRESS) return 0;
	}
	r = connect(fd, sa, sl);
	if (!r \|\| errno == EINPROGRESS) return 0;
	close(fd);
	pfd->fd = -1;
	return -1;
	}

	static void step_mh(struct msghdr *mh, size_t n)
	{
	/* Adjust iovec in msghdr to skip first n bytes. */
	while (mh->msg_iovlen && n >= mh->msg_iov->iov_len) {
	n -= mh->msg_iov->iov_len;
	mh->msg_iov++;
	mh->msg_iovlen--;
	}
	if (!mh->msg_iovlen) return;
	mh->msg_iov->iov_base = (char *)mh->msg_iov->iov_base + n;
	mh->msg_iov->iov_len -= n;
	}

	/* Internal contract for __res_msend[_rc]: asize must be >=512, nqueries
	* must be sufficiently small to be safe as VLA size. In practice it's
	* either 1 or 2, anyway. */

	int __res_msend_rc(int nqueries, const unsigned char const queries,
	const int qlens, unsigned char const answers, int alens, int asize,
	const struct resolvconf *conf)
	{
	int fd;
	int timeout, attempts, retry_interval, servfail_retry;
	union {
	struct sockaddr_in sin;
	struct sockaddr_in6 sin6;
	} sa = {0}, ns[MAXNS] = {{0}};
	socklen_t sl = sizeof sa.sin;
	int nns = 0;
	int family = AF_INET;
	int rlen;
	int next;
	int i, j;
	int cs;
	struct pollfd pfd[nqueries+2];
	int qpos[nqueries], apos[nqueries];
	unsigned char alen_buf[nqueries][2];
	int r;
	unsigned long t0, t1, t2;

	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);

	timeout = 1000*conf->timeout;
	attempts = conf->attempts;

	for (nns=0; nns<conf->nns; nns++) {
	const struct address *iplit = &conf->ns[nns];
	if (iplit->family == AF_INET) {
	memcpy(&ns[nns].sin.sin_addr, iplit->addr, 4);
	ns[nns].sin.sin_port = htons(53);
	ns[nns].sin.sin_family = AF_INET;
	} else {
	sl = sizeof sa.sin6;
	memcpy(&ns[nns].sin6.sin6_addr, iplit->addr, 16);
	ns[nns].sin6.sin6_port = htons(53);
	ns[nns].sin6.sin6_scope_id = iplit->scopeid;
	ns[nns].sin6.sin6_family = family = AF_INET6;
	}
	}

	/* Get local address and open/bind a socket */
	fd = socket(family, SOCK_DGRAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0);

	/* Handle case where system lacks IPv6 support */
	if (fd < 0 && family == AF_INET6 && errno == EAFNOSUPPORT) {
	for (i=0; i<nns && conf->ns[nns].family == AF_INET6; i++);
	if (i==nns) {
	pthread_setcancelstate(cs, 0);
	return -1;
	}
	fd = socket(AF_INET, SOCK_DGRAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0);
	family = AF_INET;
	sl = sizeof sa.sin;
	}

	/* Convert any IPv4 addresses in a mixed environment to v4-mapped */
	if (fd >= 0 && family == AF_INET6) {
	setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &(int){0}, sizeof 0);
	for (i=0; i<nns; i++) {
	if (ns[i].sin.sin_family != AF_INET) continue;
	memcpy(ns[i].sin6.sin6_addr.s6_addr+12,
	&ns[i].sin.sin_addr, 4);
	memcpy(ns[i].sin6.sin6_addr.s6_addr,
	"\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
	ns[i].sin6.sin6_family = AF_INET6;
	ns[i].sin6.sin6_flowinfo = 0;
	ns[i].sin6.sin6_scope_id = 0;
	}
	}

	sa.sin.sin_family = family;
	if (fd < 0 \|\| bind(fd, (void *)&sa, sl) < 0) {
	if (fd >= 0) close(fd);
	pthread_setcancelstate(cs, 0);
	return -1;
	}

	/* Past this point, there are no errors. Each individual query will
	* yield either no reply (indicated by zero length) or an answer
	* packet which is up to the caller to interpret. */

	for (i=0; i<nqueries; i++) pfd[i].fd = -1;
	pfd[nqueries].fd = fd;
	pfd[nqueries].events = POLLIN;
	pfd[nqueries+1].fd = -2;

	pthread_cleanup_push(cleanup, pfd);
	pthread_setcancelstate(cs, 0);

	memset(alens, 0, sizeof alens nqueries);

	retry_interval = timeout / attempts;
	next = 0;
	t0 = t2 = mtime();
	t1 = t2 - retry_interval;

	for (; t2-t0 < timeout; t2=mtime()) {
	/* This is the loop exit condition: that all queries
	* have an accepted answer. */
	for (i=0; i<nqueries && alens[i]>0; i++);
	if (i==nqueries) break;

	if (t2-t1 >= retry_interval) {
	/* Query all configured namservers in parallel */
	for (i=0; i<nqueries; i++)
	if (!alens[i])
	for (j=0; j<nns; j++)
	sendto(fd, queries[i],
	qlens[i], MSG_NOSIGNAL,
	(void *)&ns[j], sl);
	t1 = t2;
	servfail_retry = 2 * nqueries;
	}

	/* Wait for a response, or until time to retry */
	if (poll(pfd, nqueries+1, t1+retry_interval-t2) <= 0) continue;

	while (next < nqueries) {
	struct msghdr mh = {
	.msg_name = (void *)&sa,
	.msg_namelen = sl,
	.msg_iovlen = 1,
	.msg_iov = (struct iovec []){
	{ .iov_base = (void *)answers[next],
	.iov_len = asize }
	}
	};
	rlen = recvmsg(fd, &mh, 0);
	if (rlen < 0) break;

	/* Ignore non-identifiable packets */
	if (rlen < 4) continue;

	/* Ignore replies from addresses we didn't send to */
	for (j=0; j<nns && memcmp(ns+j, &sa, sl); j++);
	if (j==nns) continue;

	/* Find which query this answer goes with, if any */
	for (i=next; i<nqueries && (
	answers[next][0] != queries[i][0] \|\|
	answers[next][1] != queries[i][1] ); i++);
	if (i==nqueries) continue;
	if (alens[i]) continue;

	/* Only accept positive or negative responses;
	* retry immediately on server failure, and ignore
	* all other codes such as refusal. */
	switch (answers[next][3] & 15) {
	case 0:
	case 3:
	break;
	case 2:
	if (servfail_retry && servfail_retry--)
	sendto(fd, queries[i],
	qlens[i], MSG_NOSIGNAL,
	(void *)&ns[j], sl);
	default:
	continue;
	}

	/* Store answer in the right slot, or update next
	* available temp slot if it's already in place. */
	alens[i] = rlen;
	if (i == next)
	for (; next<nqueries && alens[next]; next++);
	else
	memcpy(answers[i], answers[next], rlen);

	/* Ignore further UDP if all slots full or TCP-mode */
	if (next == nqueries) pfd[nqueries].events = 0;

	/* If answer is truncated (TC bit), fallback to TCP */
	if ((answers[i][2] & 2) \|\| (mh.msg_flags & MSG_TRUNC)) {
	alens[i] = -1;
	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, 0);
	r = start_tcp(pfd+i, family, ns+j, sl, queries[i], qlens[i]);
	pthread_setcancelstate(cs, 0);
	if (r >= 0) {
	qpos[i] = r;
	apos[i] = 0;
	}
	continue;
	}
	}

	for (i=0; i<nqueries; i++) if (pfd[i].revents & POLLOUT) {
	struct msghdr mh = {
	.msg_iovlen = 2,
	.msg_iov = (struct iovec [2]){
	{ .iov_base = (uint8_t[]){ qlens[i]>>8, qlens[i] }, .iov_len = 2 },
	{ .iov_base = (void *)queries[i], .iov_len = qlens[i] } }
	};
	step_mh(&mh, qpos[i]);
	r = sendmsg(pfd[i].fd, &mh, MSG_NOSIGNAL);
	if (r < 0) goto out;
	qpos[i] += r;
	if (qpos[i] == qlens[i]+2)
	pfd[i].events = POLLIN;
	}

	for (i=0; i<nqueries; i++) if (pfd[i].revents & POLLIN) {
	struct msghdr mh = {
	.msg_iovlen = 2,
	.msg_iov = (struct iovec [2]){
	{ .iov_base = alen_buf[i], .iov_len = 2 },
	{ .iov_base = answers[i], .iov_len = asize } }
	};
	step_mh(&mh, apos[i]);
	r = recvmsg(pfd[i].fd, &mh, 0);
	if (r <= 0) goto out;
	apos[i] += r;
	if (apos[i] < 2) continue;
	int alen = alen_buf[i][0]*256 + alen_buf[i][1];
	if (alen < 13) goto out;
	if (apos[i] < alen+2 && apos[i] < asize+2)
	continue;
	int rcode = answers[i][3] & 15;
	if (rcode != 0 && rcode != 3)
	goto out;

	/* Storing the length here commits the accepted answer.
	* Immediately close TCP socket so as not to consume
	* resources we no longer need. */
	alens[i] = alen;
	__syscall(SYS_close, pfd[i].fd);
	pfd[i].fd = -1;
	}
	}
	out:
	pthread_cleanup_pop(1);

	/* Disregard any incomplete TCP results */
	for (i=0; i<nqueries; i++) if (alens[i]<0) alens[i] = 0;

	return 0;
	}

	int __res_msend(int nqueries, const unsigned char const queries,
	const int qlens, unsigned char const answers, int alens, int asize)
	{
	struct resolvconf conf;
	if (__get_resolv_conf(&conf, 0, 0) < 0) return -1;
	return __res_msend_rc(nqueries, queries, qlens, answers, alens, asize, &conf);
	}